Description
A straight connection for your 100mm hose
Bring suitable 100mm-bore hose to a matching 4-inch BSP female fitting with this black plastic adapter.
A ribbed single-size hosetail and external male thread sit on either side of the shaped shoulder. Check the hose and equipment connection independently before assembly.
One adapter supplied. Hose, clips and equipment are separate.
100mm hose. 4-inch BSP thread.
These are two different connection measurements. The hosetail is for suitable 100mm internal-bore hose; the threaded end follows the nominal BSP size system.
The photograph shows the 4-inch male thread at approximately 113mm across the outside. A threaded fitting chosen simply because an opening measures 100mm will not establish a compatible connection.
Check the equipment’s stated thread and sealing requirements, then match the hose bore and wall profile to the barb.
Leave room to assemble and inspect
Plan access around the thread and the fitted hose.
Identify the female fitting
Use a compatible 4-inch BSP female connection. Follow the equipment instructions for any sealing parts and for tightening plastic fittings; the adapter is supplied on its own.
Seat and secure the hose
Choose suitable 100mm internal-bore hose and check its fit on the hosetail. Select clips from the fitted outside diameter and construction. A 100-120mm clip is suitable only where that measurement and securing method match.
Support the connection
Route and support the hose so its weight does not pull on the equipment port. Leave the joints accessible and inspect them with water before covering the installation.
Before fitting the 100mm adapter
Why does the 4-inch thread measure about 113mm?
BSP uses nominal pipe-thread sizes. The 4-inch male thread is approximately 113mm across its outside, as labelled in the photograph; it is not a 100mm threaded opening. Match it to a compatible 4-inch BSP female fitting and check the equipment’s sealing arrangement. The separate 100mm hosetail is the end intended for the hose.
Which hose clips should I choose?
Measure the hose’s outside diameter after it is seated on the hosetail, then choose a clip range and design suitable for that measurement and hose construction. The suggested 100-120mm clip is an option only where the fitted outside diameter falls within its range. It is not a universal fit for every hose sold as 100mm bore, and clips are separate.
Does the 100mm size establish a pressure or flow rating?
No. It identifies the nominal hose connection size. A system’s operating requirements depend on the pump, hose, fittings and installation, so check the equipment specification before choosing this adapter. The connection dimensions do not establish a pressure, temperature or litres-per-minute rating, nor do they confirm suitability for a particular chemical.
Is this a threaded hose connector or a tank outlet kit?
This is one straight hosetail adapter with a 4-inch BSP male thread at one end and a 100mm hose connection at the other. It is not a complete tank outlet assembly, valve or hose kit. Select any additional sealing, mounting and securing parts to suit the actual equipment and keep the completed hose run supported and accessible for inspection.
Product information & technical details
| SKU | POND100B-4BSPMSTR001 |
|---|---|
| Product type | |
| BSP thread size | 4" |
| Thread gender | Male |
| Barb size | 100mm (4") |
| Colour | Black |
|---|---|
| Material | Plastic |
| Connection layout | Straight 100mm hosetail to 4-inch BSP male thread |
| External thread diameter | Approximately 113mm, as shown in the connection-size photograph |
| Contents | One adapter; hose, clips and equipment not included |
What is BSP?
What is BSP thread size?
BSP (British Standard Pipe) is a nominal pipe-thread size, not a direct measurement of a fitting’s bore or outside diameter. For example, a ½-inch BSP male thread measures about 21mm across its outer thread crests.
These figures are approximate outside diameters of male BSP threads, to help identify the nominal size. They are not inch-to-millimetre unit conversions:
- 3/8" BSP → 16.66 mm
- 1/2" BSP → 20.95 mm
- 3/4" BSP → 26.44 mm
- 1" BSP → 33.25 mm
- 1.25" BSP → 41.91 mm
- 1.5" BSP → 47.80 mm
- 2" BSP → 59.61 mm
- 3" BSP → 87.88 mm
- 4" BSP → 113.03 mm
All our BSP threads are parallel (BSPP, to ISO 228), not tapered.
Measure across the outside of a male thread, then check its pitch and whether it is parallel or tapered. Diameter alone does not confirm compatibility. Check the product’s stated thread specification before connecting.
All delivery times are estimates and not guaranteed. Orders placed before 1 pm, Monday to Friday (excluding bank holidays), will be dispatched the same day, while orders placed after 1 pm will be dispatched by the end of the next working day.
If an invalid postcode or address is provided, the order will be cancelled without further notice, as we are unable to modify addresses or print labels for invalid postcodes.
Our standard delivery option is Royal Mail Tracked 48, which typically takes 3–5 business days. If you need your order more quickly, Expedited delivery via Royal Mail Tracked 24 is available, offering a 1–2 business day service.
Large or bulky items may be sent via courier at our discretion and are usually dispatched for next-day delivery. Please note that we only ship to mainland UK addresses; delivery to non-mainland locations, including the Highlands & Islands, may not be available for large or heavy items. If your address falls into one of these areas and you wish to purchase such items, please contact us with your postcode and order details before placing your order. If we cannot ship to you, you are welcome to arrange your own courier for collection.
All products, unless otherwise stated, come with a standard manufacturer warranty against faulty workmanship.
If your product fails within six months of delivery, please contact us with your order reference number, a description of the issue, and clear images illustrating the fault.
Should your item require a return for further investigation, it is your responsibility to arrange and cover postage back to us.
If we are unable to repair the fault, we may offer either a replacement or a full refund.
In cases where the item is inspected and found not to be faulty, or where damage is determined not to be due to manufacturing defects, you will not be entitled to a refund or replacement. We will then either return the item to you via standard post or dispose of it at your request.
You may return any order within 14 days of delivery. As soon as you receive your items, please inspect them carefully, taking reasonable care to keep both the product and its packaging clean and undamaged. If you discover an error or defect after 14 days, we reserve the right to decline your return. If your product fails or breaks after this 14-day time window then your order may be eligible for a warranty claim, please see our warranty information for more details.
To initiate a return, please contact us via our contact form to obtain a return authorisation and the correct returns address (different from the address on your invoice). This can also be done through your 'recent orders' page on your account if you are registered with Shop. Returns sent without prior authorisation will be discarded.
Returned items must be in the same condition in which you received them: unworn or unused, with tags attached and in their original packaging. You must include either a copy of your invoice or a slip with your order reference number inside the parcel. Please be sure not to obscure your return reference number on the label.
If you refuse delivery or reject the parcel without prior notice, we will inspect the returned package and issue a refund upon receipt. Although there is no restocking fee, we will deduct the cost of the return postage label (£3.35) from your refund.
If the returned item or its packaging shows signs of use, damage, or staining, we may deduct up to 50% of the order value, or refuse the return entirely, depending on its condition. Examples include damaged tags, stained, modified or damaged packaging, or missing components.
For faulty, incorrect, or damaged items, please contact us before sending anything back so we can attempt to resolve the issue directly. If we agree that a return is necessary due to our error, we will provide you with a pre-paid return label.
Products that have been modified or damaged through customer action are not eligible for return. This includes, but is not limited to, items that have been cut, trimmed or otherwise altered (such as a tarpaulin or pond liner resized to your specifications), or any product showing damage beyond normal inspection handling.
All delivery times are estimates and not guaranteed. Orders placed before 1 pm, Monday to Friday (excluding bank holidays), will be dispatched the same day, while orders placed after 1 pm will be dispatched by the end of the next working day.
If an invalid postcode or address is provided, the order will be cancelled without further notice, as we are unable to modify addresses or print labels for invalid postcodes.
Our standard delivery option is Royal Mail Tracked 48, which typically takes 3–5 business days. If you need your order more quickly, Expedited delivery via Royal Mail Tracked 24 is available, offering a 1–2 business day service.
Large or bulky items may be sent via courier at our discretion and are usually dispatched for next-day delivery. Please note that we only ship to mainland UK addresses; delivery to non-mainland locations, including the Highlands & Islands, may not be available for large or heavy items. If your address falls into one of these areas and you wish to purchase such items, please contact us with your postcode and order details before placing your order. If we cannot ship to you, you are welcome to arrange your own courier for collection.
All products, unless otherwise stated, come with a standard manufacturer warranty against faulty workmanship.
If your product fails within six months of delivery, please contact us with your order reference number, a description of the issue, and clear images illustrating the fault.
Should your item require a return for further investigation, it is your responsibility to arrange and cover postage back to us.
If we are unable to repair the fault, we may offer either a replacement or a full refund.
In cases where the item is inspected and found not to be faulty, or where damage is determined not to be due to manufacturing defects, you will not be entitled to a refund or replacement. We will then either return the item to you via standard post or dispose of it at your request.
You may return any order within 14 days of delivery. As soon as you receive your items, please inspect them carefully, taking reasonable care to keep both the product and its packaging clean and undamaged. If you discover an error or defect after 14 days, we reserve the right to decline your return. If your product fails or breaks after this 14-day time window then your order may be eligible for a warranty claim, please see our warranty information for more details.
To initiate a return, please contact us via our contact form to obtain a return authorisation and the correct returns address (different from the address on your invoice). This can also be done through your 'recent orders' page on your account if you are registered with Shop. Returns sent without prior authorisation will be discarded.
Returned items must be in the same condition in which you received them: unworn or unused, with tags attached and in their original packaging. You must include either a copy of your invoice or a slip with your order reference number inside the parcel. Please be sure not to obscure your return reference number on the label.
If you refuse delivery or reject the parcel without prior notice, we will inspect the returned package and issue a refund upon receipt. Although there is no restocking fee, we will deduct the cost of the return postage label (£3.35) from your refund.
If the returned item or its packaging shows signs of use, damage, or staining, we may deduct up to 50% of the order value, or refuse the return entirely, depending on its condition. Examples include damaged tags, stained, modified or damaged packaging, or missing components.
For faulty, incorrect, or damaged items, please contact us before sending anything back so we can attempt to resolve the issue directly. If we agree that a return is necessary due to our error, we will provide you with a pre-paid return label.
Products that have been modified or damaged through customer action are not eligible for return. This includes, but is not limited to, items that have been cut, trimmed or otherwise altered (such as a tarpaulin or pond liner resized to your specifications), or any product showing damage beyond normal inspection handling.